/**
 * Go on with current learning unit  
 * 
 * @author Gerd Wagner
 * 
 */
oa.ctrl.continueCurrentLearningUnit = function () {
  var cLU = oa.currentLearningUnit;
  if (oa.currentExerciseNumber < cLU.exercises.length) {
    oa.currentExerciseNumber++;
    oa.currentExercise = cLU.exercises[oa.currentExerciseNumber-1];
    oa.ctrl.startExercise( oa.currentExercise);    
  }
  else {  // End of Learning Unit
    oa.view.resetScreen();
  }
};
